CN103969049A - Deflation device and method for cavitation testing of cooling system - Google Patents
Deflation device and method for cavitation testing of cooling system Download PDFInfo
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- CN103969049A CN103969049A CN201410175611.XA CN201410175611A CN103969049A CN 103969049 A CN103969049 A CN 103969049A CN 201410175611 A CN201410175611 A CN 201410175611A CN 103969049 A CN103969049 A CN 103969049A
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- solenoid valve
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Abstract
The invention discloses a deflation device and method for cavitation tests of a cooling system, and belongs to the field of engine tests. The device comprises a pipeline, a first electromagnetic valve, a second electromagnetic valve, a detection system and a control system. The pipeline is communicated with an expansion kettle. The first electromagnetic valve and the second electromagnetic valve are both arranged on the pipeline. The first electromagnetic valve is located between the second electromagnetic valve and the expansion kettle. The detection system is arranged on the cooling system. The first electromagnetic valve, the second electromagnetic valve and the detection system are all electrically connected with the control system. According to the device, the pressure of the cooling system and the flow of cooling liquid of the cooling system are detected through the detection system, detected data are fed back to the control system, the control system automatically controls the first electromagnetic valve and the second electromagnetic valve to be alternatively turned on or turned off, the cooling system is automatically deflated without manual operation, deflation amplitude, speed and time of the cooling system are accurately controlled, and cavitation limiting pressure is accurately measured.
Description
Technical field
The present invention relates to engine test field, particularly means of deflation and method for a kind of cooling system cavitation experiment.
Background technology
The cooling system of Modern Automobile Engine is forced circulation water-cooling system, utilizes water pump to improve the pressure of liquid coolant, forces liquid coolant is circulated in engine.But in the process of pump operation, due to the variation of pressure and temperature in water pump, can cause water pump and even whole cooling system to occur cavitation.There is comparatively serious harm to cooling system in cavitation, so before engine is produced in batches, need to carry out cavitation experiment to cooling system, measures the cavitation extreme pressure that cavitation appears in water pump under different rotating speeds and different temperatures.In process of the test, conventionally need to reduce by means of deflation the pressure of whole cooling system.
Means of deflation of the prior art is expansion kettle, expansion kettle is communicated with cooling system, and be provided with air release on expansion kettle, during use, manually expansion kettle is operated, open the air release on expansion kettle and observe the pressure in cooling system, when declining appears in the pressure in cooling system, close air release, observe the fluctuations in discharge situation of liquid coolant in cooling system simultaneously, at the flow of liquid coolant when declining, again open after air release is exitted air release cuts out, so circulation is until the flow of liquid coolant drops to required value, now the pressure in cooling system is the cavitation extreme pressure that occurs cavitation.
In realizing process of the present invention, inventor finds that prior art at least exists following problem:
Expansion kettle of the prior art needs manually to operate on it in use, because manual operation is wayward to venting amplitude, venting speed, deflation time etc., the phenomenon such as be easy to occur venting amplitude or venting speed is excessive, deflation time is long, finally cause the pressure drop in cooling system excessive, the flow of liquid coolant is dropped to below required value, finally cannot accurately record the cavitation extreme pressure of cooling system.
Summary of the invention
Wayward and cause accurately recording the problem of the cavitation extreme pressure of cooling system in order to solve prior art manual operation, the embodiment of the present invention provides a kind of means of deflation and method for cooling system cavitation experiment.Described technical scheme is as follows:
On the one hand, a kind of cooling system cavitation experiment means of deflation is provided, described device comprises pipeline, the first solenoid valve, the second solenoid valve, detection system and control system, described pipeline, expansion kettle, cooling system is communicated with in turn, described the first solenoid valve and described the second solenoid valve are all arranged on described pipeline, described detection system is arranged on described cooling system, described detection system is for detection of the flow of liquid coolant in described cooling system and the pressure in described cooling system, described the first solenoid valve, described the second solenoid valve, described detection system is all electrically connected to described control system.
Further, described detection system comprises pressure transducer and flow sensor, and it is inner that described pressure transducer, described flow sensor are all arranged on described cooling system.
Further, described detection system comprises pressure transducer and flow sensor, it is outside that described pressure transducer is arranged on described cooling system, and described pressure transducer and described expansion kettle internal communication, and it is inner that described flow sensor is arranged on described cooling system.
Further, described device also comprises bull connector, and described bull connector is communicated with described pipeline, described pressure transducer, described expansion kettle respectively.
Further, described control system comprises electric control box and control panel, described control panel is arranged on described electric control box, and described electric control box is electrically connected to described the first solenoid valve, described the second solenoid valve, described pressure transducer, described flow sensor, described control panel respectively.
As preferably, described pipeline is hot type sampling conduit.
Further, described the first solenoid valve is two-bit triplet solenoid valve, and described the second solenoid valve is two two-way electromagnetic valves.
Further, described device also comprises power supply, and described power supply is electrically connected to described control system.
As preferably, described device also comprises compressed air hose, and described compressed air hose, described the first solenoid valve, described pipeline are communicated with in turn, and described compressed air hose is for passing into pressurized air to described pipeline.
On the other hand, provide a kind of cooling system cavitation experiment venting method, described method comprises:
Pipeline in means of deflation, expansion kettle for cooling system cavitation experiment are communicated with in turn with cooling system;
By detection system, detect the pressure in described cooling system;
Pressure in described cooling system reaches first threshold, opens the first solenoid valve, and the gas in described cooling system is entered in the pipeline between described the first solenoid valve and the second solenoid valve;
By detection system, detect the flow of liquid coolant in described cooling system;
When the flow of described liquid coolant being detected, decline, close described the first solenoid valve, and open described the second solenoid valve, the described ducted gas between described the first solenoid valve and the second solenoid valve is discharged;
Close described the second solenoid valve, detect the flow of described liquid coolant, and judge whether the flow of described liquid coolant drops to required value;
If the flow of described liquid coolant drops to required value, stop venting, if the flow of described liquid coolant required value described in drop-out value not repeats above-mentioned steps until the flow of described liquid coolant drops to required value.
The beneficial effect that the technical scheme that the embodiment of the present invention provides is brought is:
Device provided by the invention detects pressure in cooling system and the flow of liquid coolant by detection system is set, and by the data feedback detecting to control system, make control system according to the data of detection system feedback, automatically controlling the first solenoid valve and the second solenoid valve alternately opens and closes, by emitting of the gas slowly in cooling system, can effectively realize cooling system exits automatically, automaticity is high, do not need manual operation to exit to cooling system, and venting amplitude in Controlled cooling system accurately, venting speed and deflation time, guarantee that the pressure in cooling system can not decline excessive, the flow that guarantees liquid coolant just reaches required value, finally obtain the cavitation extreme pressure of cooling system accurately.
The pressure of method provided by the invention in cooling system reaches after first threshold, automatically opening the first solenoid valve exits to cooling system, and the flow of liquid coolant is automatically closed the first solenoid valve and is opened the second solenoid valve after declining in cooling system being detected, gas between the first solenoid valve and the second solenoid valve is emitted to the rear flow of automatically closing the second solenoid valve and again detecting liquid coolant, so circulation is until the flow of liquid coolant drops to required value, accurate venting amplitude in Controlled cooling system, venting speed and deflation time, guarantee that the pressure in cooling system can not decline excessive, the flow that guarantees liquid coolant just reaches required value, finally obtain the cavitation extreme pressure of cooling system accurately.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the cooling system cavitation experiment means of deflation structural representation that the embodiment of the present invention provides;
Fig. 2 is the cooling system cavitation experiment means of deflation structural representation that further embodiment of this invention provides;
Fig. 3 is the process flow diagram of venting method for the cooling system cavitation experiment that provides of further embodiment of this invention;
1 pipeline,
2 first solenoid valves,
3 second solenoid valves,
4 detection systems,
41 pressure transducers,
42 flow sensors,
5 control system,
51 electric control boxes,
52 control panels,
6 cooling systems,
7 expansion kettles,
8 bull connectors.
Embodiment
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
As shown in Figure 1, the embodiment of the present invention provides a kind of cooling system 6 cavitation experiment means of deflations, this device comprises pipeline 1, the first solenoid valve 2, the second solenoid valve 3, detection system 4 and control system 5, pipeline 1, expansion kettle 7, cooling system 6 is communicated with in turn, the first solenoid valve 2 and the second solenoid valve 3 are all arranged on pipeline 1, the first solenoid valve 2 is between the second solenoid valve 3 and expansion kettle 7, detection system 4 is arranged on cooling system 6, detection system 4 is for detection of the flow of liquid coolant in cooling system 6 and the pressure in cooling system 6, the first solenoid valve 2, the second solenoid valve 3, detection system 4 is all electrically connected to control system 5.During use, pressure in 4 pairs of cooling systems 6 of detection system and the flow of liquid coolant detect, and by the data feedback of the flow of the pressure in the cooling system detecting 6 and liquid coolant to control system 5, when the pressure in cooling system 6 being detected reaches the pressure that need to exit, control system 5 is according to feed back to the data of control system 5 from detection system 4, automatically controlling the first solenoid valve 2 opens, gas in cooling system 6 is entered in the pipeline 1 between the first solenoid valve 2 and the second solenoid valve 3, when detection system 4 detects pressure in cooling system 6 and declines to some extent, automatically close the first solenoid valve 2, and open the second solenoid valve 3, gas in pipeline 1 between the first solenoid valve 2 and the second solenoid valve 3 is emitted, then the second solenoid valve 3 cuts out, so circulation drops to required value until detection system 4 detects the flow of liquid coolant in cooling system 6, now control system 5 control the first solenoid valves 2 and the second solenoid valve 3 all keep closing.
It should be noted that: the required value that in cooling system 6, the flow of liquid coolant need to drop to because the flow of liquid coolant 3%.
Principle of the present invention is the principle based on ideal gas state, and the Ideal-Gas Equation is:
Wherein, P
1, V
1, n, R, T
1be the first solenoid valve 2 while not opening, the gaseous state value between cooling system 6 to first solenoid valves 2; P
2, V
2, n, R, T
2while being the first solenoid valve 2 unlatching, the gaseous state value between cooling system 6 to second solenoid valves 3; P wherein
1, P
2be pressure, V
1, V
2be volume, T
1, T
2be temperature, n is amount of substance, and R is parameter, so above-mentioned formula can be reduced to:
Due to be wherein before the first solenoid valve 2 is opened and the first solenoid valve 2 open after the changing value of volume be the volume of pipeline 1 between the first solenoid valve 2 and the second solenoid valve 3, that is to say V
1, V
2between gap be the volume of pipeline 1 between the first solenoid valve 2 and the second solenoid valve 3, because pipeline 1 is thin and the first solenoid valve 2 and the second solenoid valve 3 close together, so V
1≈ V
2, P in like manner
1≈ P
2.
Device provided by the invention detects pressure in cooling systems 6 and the flow of liquid coolant by detection system 4 is set, and by the data feedback detecting to control system 5, make control system 5 according to the data of detection system 4 feedbacks, automatically controlling the first solenoid valve 2 and the second solenoid valve 3 alternately opens and closes, by emitting of the gas slowly in cooling system 6, can effectively realize cooling system 6 exits automatically, automaticity is high, do not need manual operation to exit to cooling system 6, and venting amplitude in Controlled cooling system 6 accurately, venting speed and deflation time, guarantee that the pressure in cooling system 6 can not decline excessive, the flow that guarantees liquid coolant just reaches required value, finally obtain the cavitation extreme pressure of cooling system 6 accurately.
Further, as shown in Figure 1, the embodiment of the present invention provides a kind of cooling system 6 cavitation experiment means of deflations, and wherein detection system 4 comprises pressure transducer 41 and flow sensor 42, and pressure transducer 41, flow sensor 42 are all arranged on cooling system 6 inside.Pressure transducer 41 is for detection of the pressure in cooling system 6, and flow sensor 42, for detection of the flow of liquid coolant in cooling system 6, is set directly at cooling system 6 inside by pressure transducer 41 and can more directly measures the pressure in cooling system 6.As preferably, pressure transducer 41 is selected high-precision pressure sensor 41 (0.2%FSN).
Further, as shown in Figure 2, the embodiment of the present invention provides a kind of cooling system 6 cavitation experiment means of deflations, wherein detection system 4 also comprises pressure transducer 41 and flow sensor 42, pressure transducer 41 is arranged on cooling system 6 outsides, and pressure transducer 41 and described expansion kettle 7 internal communication, flow sensor 42 is arranged on cooling system 6 inside.Wherein, pressure transducer 41 is arranged on cooling system 6 outsides, can be by connecting pipe by pressure transducer 41 and expansion kettle 7 internal communication, make pressure transducer 41 measure the pressure in cooling system 6 by the pressure of measuring in connecting pipe, pressure transducer 41 is arranged on to cooling system 6 outsides, can more easily pressure transducer 41 is changed or be overhauled.
Further, as shown in Figure 1, the embodiment of the present invention provides a kind of cooling system 6 cavitation experiment means of deflations, wherein this device also comprises bull connector 8, bull connector 8 is arranged on pipeline 1, pressure transducer 41, between expansion kettle 7 threes, and bull connector 8 respectively with pipeline 1, the connecting pipe of pressure transducer 41, expansion kettle 7 connects, by pipeline 1, pressure transducer 41, expansion kettle 7 threes be communicated with, wherein bull connector 8 inside have formed pressure stabilizing cavity, buffer action by pressure stabilizing cavity can make the mild arrival pressure transducer 41 of gas in cooling system 6, the data fluctuations of avoiding pressure transition steadily not cause pressure transducer 41 to collect is larger.
Further, as shown in Figure 1, the embodiment of the present invention provides a kind of cooling system 6 cavitation experiment means of deflations, wherein control system 5 comprises electric control box 51 and control panel 52, control panel 52 is arranged on electric control box 51, and electric control box 51 is electrically connected to the first solenoid valve 2, the second solenoid valve 3, pressure transducer 41, flow sensor 42, control panel 52 respectively.The data transmission that pressure transducer 41 and flow sensor 42 are measured is to electric control box 51, when electric control box 51 is controlled the first solenoid valve 2 and the second solenoid valve 3 automatically according to the data of measuring, the data of measuring show after electric control box 51 is processed on control panel 52, staff can also be operated control panel 52 according to the data that show on control panel 52, when electric control box 51 detects the instruction that staff sends, instruction is transformed and the first solenoid valve 2 and the second solenoid valve 3 are controlled, so circulation, until the flow of liquid coolant drops to required value in cooling system 6.
Wherein, electric control box 51 comprise PLC, relay, etc. electronic devices and components, on control panel 52, include display screen and operation interface, display screen is for showing that the pressure of cooling system 6 that detection system 4 detects is, the data such as flow of liquid coolant, facilitate staff to observe the data that detect, operation interface can be for facilitating staff to control means of deflation.
As preferably, as shown in Figure 1, the embodiment of the present invention provides a kind of cooling system 6 cavitation experiment means of deflations, wherein pipeline 1 is hot type sampling conduit, by pipeline 1 is set to hot type sampling conduit, can avoid gas in cooling system 6 to enter the rear temperature of pipeline 1 and have greatly changed, to guarantee T
1≈ T
2.Thereby realized the balance of gas the Ideal-Gas Equation.
Further, as shown in Figure 1, the embodiment of the present invention provides a kind of cooling system 6 cavitation experiment means of deflations, wherein the first solenoid valve 2 is two-bit triplet solenoid valve, thereby the gas in assurance pipeline 1 can be emitted by the first solenoid valve 2, the second solenoid valve 3 is two two-way electromagnetic valves, thereby the gas in assurance pipeline 1 can be emitted by the second solenoid valve 3.As preferably, the first solenoid valve 2 is selected 24-VDC two-bit triplet air inlet electromagnetic valve, and the second solenoid valve 3 is selected two two-way exhaust solenoid valves of 24-VDC.
Further, as shown in Figure 1, the embodiment of the present invention provides a kind of cooling system 6 cavitation experiment means of deflations, and wherein device also comprises power supply, and power supply is electrically connected to control system 5, and power supply is used to and the invention provides electric energy.As preferably, power supply selects 220VAC～24VDC direct current to deliver current switching power supply.
As preferably, as shown in Figure 1, the embodiment of the present invention provides a kind of cooling system 6 cavitation experiment means of deflations, wherein device also comprises compressed air hose, compressed air hose is communicated with pipeline 1 by the first solenoid valve 2, compressed air hose is for passing into pressurized air to pipeline 1, wherein before exitting or after exitting at every turn at every turn, pipeline 1 is communicated with compressed air hose, utilize pressurized air to purge pipeline 1 inside, prevent that gas is after pipeline 1 internal condensation, at the inner condensate water of retaining of pipeline 1.
Embodiment bis-
As shown in Figure 3, the embodiment of the present invention provides a kind of cooling system 6 cavitation experiments venting method, and the method comprises:
Step 101: the pipeline in means of deflation, expansion kettle for cooling system cavitation experiment are communicated with in turn with cooling system;
Step 102: detect the pressure in cooling system by detection system;
Step 103: the pressure in cooling system reaches first threshold, opens the first solenoid valve, and the gas in cooling system is entered in the pipeline between the first solenoid valve and the second solenoid valve;
Step 104: the flow that detects liquid coolant in cooling system by detection system;
Step 105: decline when the flow of liquid coolant being detected, close the first solenoid valve, and open the second solenoid valve, the ducted gas between the first solenoid valve and the second solenoid valve is discharged;
Step 106: close the second solenoid valve, detect the flow of liquid coolant, and judge whether the flow of liquid coolant drops to required value;
If the flow of liquid coolant drops to required value, perform step 107, if the flow of liquid coolant drop-out value required value not repeats above-mentioned steps until the flow of liquid coolant drops to required value.
Step 107: stop venting.
The pressure of method provided by the invention in cooling system 6 reaches after first threshold, automatically opening 2 pairs of cooling systems 6 of the first solenoid valve exits, and the flow of liquid coolant is automatically closed the first solenoid valve 2 and is opened the second solenoid valve 3 after declining in cooling system 6 being detected, gas between the first solenoid valve 2 and the second solenoid valve 3 is emitted to the rear flow of automatically closing the second solenoid valve 3 and again detecting liquid coolant, so circulation is until the flow of liquid coolant drops to required value, accurate venting amplitude in Controlled cooling system 6, venting speed and deflation time, guarantee that the pressure in cooling system 6 can not decline excessive, the flow that guarantees liquid coolant just reaches required value, finally obtain the cavitation extreme pressure of cooling system 6 accurately.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a cooling system cavitation experiment means of deflation, it is characterized in that, described device comprises pipeline, the first solenoid valve, the second solenoid valve, detection system and control system, described pipeline, expansion kettle, cooling system is communicated with in turn, described the first solenoid valve and described the second solenoid valve are all arranged on described pipeline, described detection system is arranged on described cooling system, described detection system is for detection of the flow of liquid coolant in described cooling system and the pressure in described cooling system, described the first solenoid valve, described the second solenoid valve, described detection system is all electrically connected to described control system.
2. device according to claim 1, is characterized in that, described detection system comprises pressure transducer and flow sensor, and it is inner that described pressure transducer, described flow sensor are all arranged on described cooling system.
3. device according to claim 1, it is characterized in that, described detection system comprises pressure transducer and flow sensor, it is outside that described pressure transducer is arranged on described cooling system, and described pressure transducer and described expansion kettle internal communication, it is inner that described flow sensor is arranged on described cooling system.
4. according to the device described in claim 2 or 3, it is characterized in that, described device also comprises bull connector, and described bull connector is communicated with described pipeline, described pressure transducer, described expansion kettle respectively.
5. device according to claim 4, it is characterized in that, described control system comprises electric control box and control panel, described control panel is arranged on described electric control box, and described electric control box is electrically connected to described the first solenoid valve, described the second solenoid valve, described pressure transducer, described flow sensor, described control panel respectively.
6. device according to claim 1, is characterized in that, described pipeline is hot type sampling conduit.
7. device according to claim 1, is characterized in that, described the first solenoid valve is two-bit triplet solenoid valve, and described the second solenoid valve is two two-way electromagnetic valves.
8. device according to claim 1, is characterized in that, described device also comprises power supply, and described power supply is electrically connected to described control system.
9. device according to claim 1, is characterized in that, described device also comprises compressed air hose, and described compressed air hose, described the first solenoid valve, described pipeline are communicated with in turn, and described compressed air hose is for passing into pressurized air to described pipeline.
10. a cooling system cavitation experiment venting method, is characterized in that, described method comprises:
Pipeline in means of deflation, expansion kettle for cooling system cavitation experiment are communicated with in turn with cooling system;
By detection system, detect the pressure in described cooling system;
Pressure in described cooling system reaches first threshold, opens the first solenoid valve, and the gas in described cooling system is entered in the described pipeline between described the first solenoid valve and the second solenoid valve;
By detection system, detect the flow of liquid coolant in described cooling system;
When the flow of described liquid coolant being detected, decline, close described the first solenoid valve, and open described the second solenoid valve, the described ducted gas between described the first solenoid valve and the second solenoid valve is discharged;
Close described the second solenoid valve, detect the flow of described liquid coolant, and judge whether the flow of described liquid coolant drops to required value;
If the flow of described liquid coolant drops to required value, stop venting, if the flow of described liquid coolant required value described in drop-out value not repeats above-mentioned steps until the flow of described liquid coolant drops to required value.
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| CN201410175611.XA CN103969049B (en) | 2014-04-28 | 2014-04-28 | Cooling system cavitation experiment means of deflation and method |
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Cited By (1)
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| CN108318253A (en) * | 2018-02-07 | 2018-07-24 | 安徽华菱汽车有限公司 | A kind of the cavitation pitting detection device and method of cylinder jacket |
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| CN103969049B (en) | 2016-08-24 |
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